Heat broth and seasoning packet from couscous in the microwave on high for 3-5 minutes or until broth begins to boil. Place couscous in a large bowl, and stir in broth mixture. Cover and let stand 5 minutes.
Fluff couscous with a fork; stir in chicken and next 6 ingredients. Serve warm or cold.
Note: Substitute 4 tsp dried basil if you can't get fresh.